486 B. F. KINGSBURY 
Tinney, Freperick 1915 The morphology of the diencephalic floor. A con- 
tribution to the study of craniate homology. Jour. Comp. Neur., vol. 
25, pp. 213-282. 
Witper, B.G. 1885 Encephalic nomenclature. N.Y.Med. Journ., Mar. 21 and 
28, 1885, pp. 325 and 354. 
1897 What is the morphologic status of the olfactory region of the 
brain? Proc. Amer. Anat. Assoc., Dec., 1897, pp. 94-99. 
PLATE 1 
EXPLANATION OF FIGURES 
Photographs, all at a magnification of ten diameters, except figure 16 which is 
< 8. Embryos of Squalus acanthias dorsal aspect. 
Series 42, no somites. length 1.5 mm. 
Series 45, 6 to 7 somites, length 2.2 mm. 
Series not sectioned, length 2.4 mm. 
Series 48, ca. 8 somites, length 2.16 mm, 
Series not sectioned, length 2.18 mm. 
Series 52, 11 to 12 somites, length 2.9 mm. 
12 Series 54, 13 to 14 somites, length 3.5 mm, 
13 Series 55, 15 somites length, 4.0 mm. oe 
14 Series 59, ca. 17 somites, length 4.8 mm. 
15 Series 69, 29 somites, length 5.0+ mm. 
16 Series 75, 41 somites, length ca. 7.0 mm. 
ESE oMNS 
